所有情况下使用的队列其实是一种双队列(deque)(两端都能输入数据的数据行列，发音为“deck”)，它允许线程从另一个队列的后端窃取工作，从而平衡进入线程池的工作。

The queue used in each case is actually a deque (a double-ended queue, pronounced "deck"), which allows threads to steal work from the back end of another queue, balancing work entering the pool.

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